Piece e.g. solar optical filter, holding device for spectacle lens, has maintaining unit including rails guiding piece to be machined, and bearing unit that is integrated to vent hole fixed on upper surface of piece to be machined

摘要

The device (200) has a maintaining unit (201) maintaining a piece to be machined (100) e.g. solar optical filter, and including two rails (210, 220) that guide the piece to be machined. The maintaining unit has a vent hole bearing unit (240) that is integrated to a vent hole (250). The vent hole is fixed on an upper surface (112) of the piece to be machined. The rails have grooves (211, 221) that receive upper and lower edges of the piece to be machined, respectively.